04.Files / Programming Fundamentals

using System;
using System.Collections.Generic;
using System.Linq;

namespace _04.Files
{
    public class File
    {
        public string Name { get; set; }

        public string Folder { get; set; }

        public long Size { get; set; }

    }

    public class Files
    {
        public static void Main()
        {
            var filesNumber = int.Parse(Console.ReadLine());
            var allFiles = new List<File>();

            for (int i = 0; i < filesNumber; i++)
            {
                var input = Console.ReadLine().Split('\\');
                var fileData = input.Last().Split(';');
                var fileName = fileData[0];
                var fileSize = fileData.Last();

                var currFile = new File();
                currFile.Folder = input[0];
                currFile.Name = fileName;
                currFile.Size = long.Parse(fileSize);
                allFiles.Add(currFile);
            }

            var command = Console.ReadLine().Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries);
            var folder = command.Last();
            var ext = command.First();

            var results = new Dictionary<string,long>();

            foreach (var file in allFiles)
            {
                if (file.Folder.Equals(folder) && file.Name.EndsWith(ext))
                {
                    results[file.Name] = file.Size;
                }
            }

            if (results.Count == 0)
            {
                Console.WriteLine("No");
            }

            else
            {
                foreach (var result in results.OrderByDescending(r => r.Value).ThenBy(r => r.Key))
                {
                    Console.WriteLine($"{result.Key} - {result.Value} KB");
                }
            }
        }
    }
}